/**
 * AR Edilizia - Design System Variables
 * Modern, consistent design tokens for the entire application
 */

:root {
  /* ========================================
     COLORS - Primary Palette
     ======================================== */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Secondary/Accent Colors */
  --color-secondary-50: #fff7ed;
  --color-secondary-100: #ffedd5;
  --color-secondary-200: #fed7aa;
  --color-secondary-300: #fdba74;
  --color-secondary-400: #fb923c;
  --color-secondary-500: #f97316;
  --color-secondary-600: #ea580c;
  --color-secondary-700: #c2410c;
  --color-secondary-800: #9a3412;
  --color-secondary-900: #7c2d12;

  /* Success Colors */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;

  /* Warning Colors */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  --color-warning-700: #b45309;

  /* Error Colors */
  --color-error-50: #fef2f2;
  --color-error-100: #fee2e2;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;
  --color-error-700: #b91c1c;

  /* Neutral Colors (Grays) */
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a3a3a3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;

  /* Semantic Color Aliases */
  --color-primary: var(--color-primary-600);
  --color-primary-hover: var(--color-primary-700);
  --color-secondary: var(--color-secondary-500);
  --color-success: var(--color-success-500);
  --color-warning: var(--color-warning-500);
  --color-error: var(--color-error-500);

  /* Text Colors */
  --color-text-primary: var(--color-neutral-900);
  --color-text-secondary: var(--color-neutral-600);
  --color-text-tertiary: var(--color-neutral-500);
  --color-text-inverse: #ffffff;

  /* Background Colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: var(--color-neutral-50);
  --color-bg-tertiary: var(--color-neutral-100);
  --color-bg-dark: var(--color-neutral-900);

  /* Border Colors */
  --color-border: var(--color-neutral-200);
  --color-border-hover: var(--color-neutral-300);
  --color-border-focus: var(--color-primary-500);

  /* ========================================
     TYPOGRAPHY
     ======================================== */

  /* Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-display: 'Poppins', var(--font-sans);
  --font-mono: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  --text-7xl: 4.5rem;      /* 72px */

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;

  /* ========================================
     SPACING
     ======================================== */
  --space-0: 0;
  --space-px: 1px;
  --space-0-5: 0.125rem;   /* 2px */
  --space-1: 0.25rem;      /* 4px */
  --space-1-5: 0.375rem;   /* 6px */
  --space-2: 0.5rem;       /* 8px */
  --space-2-5: 0.625rem;   /* 10px */
  --space-3: 0.75rem;      /* 12px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-7: 1.75rem;      /* 28px */
  --space-8: 2rem;         /* 32px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-14: 3.5rem;      /* 56px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */
  --space-24: 6rem;        /* 96px */
  --space-32: 8rem;        /* 128px */
  --space-40: 10rem;       /* 160px */
  --space-48: 12rem;       /* 192px */
  --space-56: 14rem;       /* 224px */
  --space-64: 16rem;       /* 256px */

  /* ========================================
     LAYOUT
     ======================================== */

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  --container-max: var(--container-xl);

  /* Container Padding */
  --container-padding: var(--space-6);
  --container-padding-sm: var(--space-4);
  --container-padding-lg: var(--space-8);

  /* Grid Gaps */
  --gap-sm: var(--space-4);
  --gap-md: var(--space-6);
  --gap-lg: var(--space-8);
  --gap-xl: var(--space-12);

  /* ========================================
     BORDERS
     ======================================== */

  /* Border Widths */
  --border-0: 0;
  --border: 1px;
  --border-2: 2px;
  --border-4: 4px;
  --border-8: 8px;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;   /* 2px */
  --radius-base: 0.25rem;  /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-3xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;

  /* ========================================
     SHADOWS
     ======================================== */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
  --shadow-none: 0 0 #0000;

  /* ========================================
     TRANSITIONS & ANIMATIONS
     ======================================== */

  /* Durations */
  --duration-75: 75ms;
  --duration-100: 100ms;
  --duration-150: 150ms;
  --duration-200: 200ms;
  --duration-300: 300ms;
  --duration-500: 500ms;
  --duration-700: 700ms;
  --duration-1000: 1000ms;

  /* Timing Functions */
  --ease-linear: linear;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Semantic Transitions */
  --transition-fast: var(--duration-150) var(--ease-out);
  --transition-base: var(--duration-200) var(--ease-in-out);
  --transition-slow: var(--duration-300) var(--ease-in-out);
  --transition-slower: var(--duration-500) var(--ease-in-out);

  /* Common Transition Properties */
  --transition-colors: color var(--transition-base),
                       background-color var(--transition-base),
                       border-color var(--transition-base);
  --transition-transform: transform var(--transition-base);
  --transition-opacity: opacity var(--transition-base);
  --transition-all: all var(--transition-base);

  /* ========================================
     Z-INDEX LAYERS
     ======================================== */
  --z-0: 0;
  --z-10: 10;
  --z-20: 20;
  --z-30: 30;
  --z-40: 40;
  --z-50: 50;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* ========================================
     BREAKPOINTS (for JavaScript usage)
     ======================================== */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Dark mode variables (optional - for future) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: var(--color-neutral-900);
    --color-bg-secondary: var(--color-neutral-800);
    --color-bg-tertiary: var(--color-neutral-700);
    --color-text-primary: var(--color-neutral-50);
    --color-text-secondary: var(--color-neutral-300);
    --color-text-tertiary: var(--color-neutral-400);
    --color-border: var(--color-neutral-700);
    --color-border-hover: var(--color-neutral-600);
  }
}

/* ========================================
   LIGHT MODE - Enhanced Variables
   ======================================== */

:root {
  /* Light Mode Backgrounds - Enhanced Darker Palette */
  --light-bg-primary: #f5f7fa;
  --light-bg-secondary: #eef2f6;
  --light-bg-tertiary: #e5e9ef;
  --light-bg-quaternary: #dce1e8;
  --light-bg-quinary: #cbd5e1;

  /* Light Mode Card System - Sophisticated Gradients */
  --light-card-bg-solid: #fafbfd;
  --light-card-bg-soft: #f6f8fb;
  --light-card-bg-gradient: linear-gradient(145deg, #fafbfd 0%, #f0f4f8 100%);
  --light-card-bg-gradient-alt: linear-gradient(145deg, #f5f7fa 0%, #eef2f7 100%);
  --light-card-bg-gradient-modern: linear-gradient(135deg, #ffffff 0%, #f4f6fa 50%, #eef2f7 100%);
  --light-card-bg-gradient-premium: linear-gradient(160deg, #fafbfd 0%, #f5f8fb 30%, #edf1f7 100%);

  /* Light Mode Borders - More Defined */
  --light-border-subtle: rgba(0, 0, 0, 0.08);
  --light-border-default: rgba(0, 0, 0, 0.15);
  --light-border-strong: rgba(0, 0, 0, 0.22);
  --light-border-accent: rgba(14, 165, 233, 0.25);
  --light-border-accent-hover: rgba(14, 165, 233, 0.45);

  /* Light Mode Shadows - Enhanced for More Depth */
  --light-shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --light-shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);
  --light-shadow-md: 0 6px 12px rgba(0, 0, 0, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
  --light-shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.12), 0 6px 10px rgba(0, 0, 0, 0.1);
  --light-shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.14), 0 10px 20px rgba(0, 0, 0, 0.12);
  --light-shadow-2xl: 0 24px 48px rgba(0, 0, 0, 0.16), 0 16px 32px rgba(0, 0, 0, 0.14);

  /* Light Mode Card Shadows - More Prominent with Blue Accent */
  --light-card-shadow: 0 6px 16px rgba(0, 0, 0, 0.1), 0 2px 6px rgba(0, 0, 0, 0.08);
  --light-card-shadow-hover: 0 16px 32px rgba(0, 0, 0, 0.14), 0 10px 20px rgba(14, 165, 233, 0.12);
  --light-card-shadow-active: 0 24px 48px rgba(0, 0, 0, 0.16), 0 16px 32px rgba(14, 165, 233, 0.14);

  /* Light Mode Text Colors */
  --light-text-primary: #0f172a;
  --light-text-secondary: #475569;
  --light-text-tertiary: #64748b;
  --light-text-quaternary: #94a3b8;
  --light-text-inverse: #ffffff;

  /* Light Mode Accent Colors */
  --light-accent-primary: #0ea5e9;
  --light-accent-primary-hover: #0284c7;
  --light-accent-secondary: #3b82f6;
  --light-accent-bg-subtle: rgba(14, 165, 233, 0.05);
  --light-accent-bg-light: rgba(14, 165, 233, 0.08);
  --light-accent-bg-medium: rgba(14, 165, 233, 0.12);
  --light-accent-bg-strong: rgba(14, 165, 233, 0.15);

  /* Light Mode Section Backgrounds - Modern Darker Gradients */
  --light-section-bg-1: linear-gradient(180deg, #f5f7fa 0%, #eef2f6 100%);
  --light-section-bg-2: linear-gradient(180deg, #eef2f6 0%, #e5e9ef 100%);
  --light-section-bg-3: linear-gradient(180deg, #e8ecf2 0%, #dce1e8 100%);
  --light-section-bg-subtle: linear-gradient(135deg, #f8fafb 0%, #f2f5f8 100%);

  /* Light Mode Interactive States */
  --light-hover-overlay: rgba(0, 0, 0, 0.04);
  --light-active-overlay: rgba(0, 0, 0, 0.08);
  --light-focus-ring: rgba(14, 165, 233, 0.3);

  /* Light Mode Status Colors */
  --light-success-bg: rgba(34, 197, 94, 0.1);
  --light-success-border: rgba(34, 197, 94, 0.2);
  --light-success-text: #16a34a;

  --light-warning-bg: rgba(245, 158, 11, 0.1);
  --light-warning-border: rgba(245, 158, 11, 0.2);
  --light-warning-text: #d97706;

  --light-error-bg: rgba(239, 68, 68, 0.1);
  --light-error-border: rgba(239, 68, 68, 0.2);
  --light-error-text: #dc2626;

  --light-info-bg: rgba(59, 130, 246, 0.1);
  --light-info-border: rgba(59, 130, 246, 0.2);
  --light-info-text: #2563eb;
}